Nuclear

B rupture 100% of 1 full tube rupture

In this investigation the tube rupture is assumed to be initiated in one of the two Steam Generators (in this case SG ‘B’) when the reactor is operated at full power 100%. The Tube is 100% ruptured. The simulation is performed for about 1800 seconds (30 mins.) to study the various transient behavior of plant parameter during the accident.

0 20 40 60 80 100 120 140 160 180 0 200 400 600 800 1000 1200 1400 1600 1800 2000 (bar) Time(sec) P-Press RCS PSGA-Pressure in Steam Generator A PSGA

Pressure in Steam Generator A P PSGA PSGB Fig. 3: Pressure in Steam generator A, Steam generator B and Reactor Coolant (bar) After the initiation of SGTR, the Primary Pressure drops instantaneously from 162 Bar to about 161.1 Bar due to opening and closing of Relief Valve for the first 200s. After that, pressure regains its initial value at 800s. But the pressure in SG remains almost same during the whole simulating time.